Lining for molds for concrete columns



3 Sheets-Sheet 1 HART El AL Filed Nov. 9, 1931 INVENTORS BYW4M4, I 4 1 A4 ATTORNEY;

LINING FOR MOLDS FOR CONCRETE COLUMNS July 4, 1933.

July 4, 1933. L. HART ET AL LJNING FOR MOLDS FOR CONCRETE COLUMNS Filed Nov. 9, 1931 5 Sheets-Sheet 2 ATTORNEYS 3 Sheets-Sheet 3 July 4, 1933. 1.. HART ET AL LINING FOR MOLDS FOR CONCRETE COLUMNS Filed Nov. 9, 1931 Patented July 4, 1933 UNITED STATES PATENT; OFFICE LIN'lON HART, or ENGLEWOOD, NEW JERSEY, AND GORDON FLE CHER, 01? NEW YORK,

CORIPORATION OF DELAWARE I V N. Y., ASSIGNOES r CAIssoN CONTRACTING COMPANY, OF NEW YORK, N. Y., A

LINING Eon oLns non CONCRETE COLUMNS Application filed November 9, 1931. Serial No. 573,840.

This invention pertains to linings for holes formed in the ground toserve as molds for concrete columns.

Each hole is sunk to solid footing by any suitable means and is then filled with concrete to form the column. It-is usually necessary to line the mold to prevent collapse of itswalls prior to the pouring of the concrete. The lining is usually a steel or wooden shell, and it mayeither be withdrawn as the concrete is poured or it may be left in the hole to become a part of the column. In either case; it is necessary for convenience in handling to form the shell in comparatively short sections which are joined together to compose the lining. An object of' the invention is to'provide means for coupling the sections together with a minimum of time and effort". I

7 Another object is to disclose a form of composite steel and wood lining readily formed on the 'job and having other favorable features which will be apparent to those skilled in the art.

Further and other objects and advantages will be apparent from the specification and claims, and from the accompanying. drawings-which illustrate what is now'considered the preferred embodiment of the invention.

Fig. 1 is a sectional view' of the steel skeleton of a section of the composite lining.

Fig; 2 is an end view of Fig. 1. A Fig.- 3 is a view, partly broken away, completed section of composite lining. 1

Fig. 4 is an endview of Fig. 3. Fig: 5 is a vertical section showing acomposite lining in the hole in the ground, and with the hoisting device attached to the upper endo-fthelining.

-Fig. 6; is a 5."

ofa

Fig.7 is an enlarged detail of the arrangement for driving the composite shell;

8 is an enlarged detail of a driving shoe on the bottom of the composite'shell.

Fig. 9 is'an enlarged detail of the coupling device for composite shell sections.

v Fig. 1 0 is 'an enlarged detail view of'a similar coupling 'device for steel shell sections. I

As shown in Figs. 1 and 2 the skeleton for cross-section on line 66 of a section of composite lining may comprise a number of similar circumferentially spaced longitudinal strips of fiat steel 20, each with an outwardly turned hook 22 at one end. Surrounding bands 20 a short distance from hooks 22 is, an angle iron ring 24'arranged substantially as shown. At the other f end of strips 20 is a similar angle iron ring 26 arranged with one flange flush with the ends of strips 20. Spaced at equal intervals along the length of the skeleton are T-iron rings 28.

Rings 24, 26 and 28 are all riveted to strips 20. The skeleton and'shellare assembled on the ob, all parts being delivered in knockeddown condition, thus effecting a great saving in freight and handling charges.

Aftera skeleton is formed as above, it is enclosed in wood staves 30, usually tonguedand-grooved, each stave being of proper length to fit between the projecting flanges of the circumferential rings of the skeleton. I

One successful method of performing the enclosing operation'is to place the skeleton on rollers 32, then to fit staves 30 on theupper side of the skeleton, gradually rotating the structure until the enclosure is complete, asin Figs. 3 and 4.

As the staves are fitted into "place, nails 34 '(Fig. 5) may bedriven through the rings into some of the staves to hold them in place, or, if desired, nails may be driven through the staves past the edges of the rings and then bent over the webs of the rings, as

at '36 (Fig. 5)., Circumferential strips 38 of band' steel are nailed around the section when the staves are all in place, and the shell section is then ready for use. It will be noted that thesection has no projecting parts.

The interior presents no projections upon which the bucket may catch onits way up or down. In fact, strips 20 serve to guide the bucket and keep it out of contact with the staves.

For convenience in handling theshell or shell sections a hoisting device is provided, comprising a ring 40, spokes 42 and cables 44 attached to plates 46 riveted to ring 40. Ring 40 is similar to rings 24-26 of the shell skeleton, therefore when it is slipped over the projecting ends of strips 20 itis autopended vertically from a crane hook engagmatically locked in position by hooks 22, which return to their normal positions after ring has passed them (Figs. 5 and 9). The shell or shell section may then be susing the upper ends of cable 44.

. The lower end of the shell section first inserted'in the hole is provided with an angle iron ring secured to the end ring 26 oftheto lower it into the hole it may be forced down bypressure applied to the top of the shell, preferably through the instrumental ity of a'ringliO (Fig. 7) of I-beam or channel steel of sufficient stiffness todistribute the pressure evenly around the shell.

It :a single shell section is insuflicient to line the:hole, other sections areadded until therequired shell length is attained. Each section is coupled to the one below it. by simply lowering it into place until ring 26 of onesection slips past hooks 220i the other section, whereupon the hookswill automatically engage the top of ring 26 and the sec tions Wlll be'locked together as indicated in Figsp'oand 9. The coupling operation may be performed either above ground or in the hole- Sections may be'uncoupled by simply wedging out the hooks and then pulling the sections apart.

. The'automatic coupling device hasbeen described as applied to a wood stave shell, but may be used in similar manner with steel shells, as shown in Fig. 10, in which shell sections 52-5l form a butt joint ata56, and in which hooks 58 fastened to one section and projecting beyond its endautomatically engage a band 60 riveted onto the end of-the 45 other section; A-spacer band 62 is usually placed between band 60 and the shell to which'itis attached, in order to provide a space 64. to accomodate any irregularities in the contours of the abutting ends. The hooks and rings. are shown on the insides of the shell, but may be on the outsides if desired. 'Ring 60 may project beyond the end of the shell sectionto'which it is attached in orderto more-readily guide the other section into proper aligned position.

It is to be understood that the invention is not limited to the specific embodiment herein illustrated anddescribed, but maybe used in other ways without departure from its spirit 11 as defined by the tollowing claims.

lve claimz 1'. A section of a lining adapted to be placed in a hole in the ground to form a'mold for a concrete column, comprising a steel skeleton having longitudinal circumferentially spaced laced in a hole in the round to forma: mold for a concrete column, comprising a steel skeleton having longitudinal circumferential 1yv spaced. strips with external rings spaced longitudinally of said strips and attached theretoto provide an unobstructed interior for the lowering oft-he digging bucket, in combmation withwooden staves between said rings whereby a tubular shell; section is formed and hooks on the ends ofsaid strips,

said hooks being adapted to engage; a ring on a similar shelli section whenthe ends of; said 1:.

sections are placed in aligned contact. 7

in a hole in the ground to form a mold for. a

concrete column, comprising a steel skeleton.

3. A section or a lining adapted to be placed 0 havinglongitudinal circumferentially spaced 1 strips with external, steel rings attached there to and having outwardly projecting circum; ferential ribs said rings being, equally spaced along said strips, in combination with wooden stavesplaced longitudinally between said ribs whereby a tubular shell section is formed.

4. The invention set forth in; claim- .3 in which said strips are provided at. their-ends with books adapted to engage the end ringof a-similar'shell section when the ends of said 15:

sections are placed in aligned contact, I

1 5.. A device of the class described, a; wooden lining; fora mold for-a; concrete columm in combination with longitudinal metal strips spaced around the interior of and away from 1'.

said liningto produce a smooth uninterrupted interior for-the passage and guidance'of a digging bucket andkeepsit out of contact with said. lining. r

m6. Aksection of a lining adapted to be I placed in a'hole in the groundtoiorm a mold for a concrete column, comprising a steel skeleton having longitudinal circumferentially spaced strips with external rings spaced longitudinally of said strips and attached thereto,staves secured to-said rings, hooks'on the ends of said strips and a hoistingring automatically engageable with said hooks. Y

7. A device of the class described, comprising a steel skeletonhaving ;-longitudinal circumferentially spaced strips with, rings spaced longitudinallyof said strips andattachedl externally thereto to 'produce'an uninterrupted interiorfor the-passage ofa diggingbucket, and staves secured'externally to the'rings whereby a tubular shell section is formed. v Q l ,8. A-device oi -th'e class described, compris ing a steel skeleton having longitudinal circumferentially spaced strips [with rings spaced longitudinally of said strips and attached externally thereto to produce an uninterrupted interior for the passage of a dig-v ging bucket, staves secured externally to the rings whereby a tubular shell section is formed, and hooks on the ends of said strips adapted to engage a ring on a similar shell section when the ends of said shell sections are placed in end to end contacting relationship.

9. A lining for a mold for concrete column, comprising a plurality of axially aligned shell sections, each including longitudinally disposed and circumferentially spaced strips, axially spaced rings secured to the outside of said strips and having outwardly projecting flanges, staves secured to said rings between said flanges and spaced from said strips, said strips serving to guide a bucket into the hole which the mold lines and to prevent contact of said bucket with the staves or rings,

and hooks on said strips adapted to enter a rlng on a correspondlng liningsection when said sections are placed in end to end contactingrelationship.

10. A lining for a mold for a concrete column, comprising a plurality of axiallyaligned shell sections,realch including longitudinally disposed and circumferentially spaced strips, axially spaced rings secured to the outside of said strips and having out-. wardly projecting flanges, staves secured to said rings between said flanges and spaced from said strips, said strips serving to guide a bucket into the hole which the mold lines.

signatures.

, LINTON HART.

GORDON FLETCHER. 

